2results about How to "Uniform internal organization" patented technology

The invention discloses a Mn-containing ultralight high-toughness weak-texture magnesium-lithium alloy sheet and a preparation method thereof, and belongs to the technical field of metal materials. The preparation method comprises the following steps: preparing materials (containing at least one of a pure magnesium ingot, a pure zinc ingot, a magnesium-lithium intermediate alloy, a magnesium-calcium intermediate alloy and a magnesium-erbium / magnesium-manganese intermediate alloy), smelting under argon protection, casting at 720-750 DEG C, cooling, carrying out linear cutting to obtain a cast ingot, preheating at 200-300 DEG C, extruding into a plate blank, and carrying out small-pass (2-4 passes) large-deformation rolling at 25-200 DEG C. According to the invention, the comprehensive mechanical properties of the alloy are improved, the basal texture is weakened and the room-temperature formability is improved by adding a light Ca element, a grain refined Mn element or a rare earth Er element through a novel short-distance efficient deformation process of extrusion pre-deformation and small-pass large-deformation online heating rolling, so that the unification of ultra-light weight, high toughness and high formability is realized, and the production cost is reduced. The method is simple in process, low in cost, efficient and suitable for the fields of aerospace, 3C electronics and the like.

The application discloses a kind of high-nitrogen high-aluminum new energy automobile gear steel and manufacturing method thereof, steel chemical composition mass percentage: C 0.18-0.25%, Si 0.2-0.4%, Mn 0.6-0.9%, Cr 0.8-1.2%, Ni 0.3-0.6%, Mo≤0.10%, Al 0.05-0.09%, N 0.018-0.025%, P≤0.01%, S≤0.005%, the balance Fe and impurities.Preparation method: electric furnace smelting→LF refining→VD vacuum degassing nitrogen-increasing→continuous casting→grading temperature control rolling.The application forms dispersed AlN grain refinement by Al-N cooperation, strictly controls harmful element to improve purity, has high strength, high toughness, high wear resistance and high fatigue resistance, tensile strength≥1200MPa, adapts new energy automobile high speed high torque condition, process is stable and can be mass-produced.